/* SAM - Sustainable Analytical Model | sambim.xyz
   Extracted from index.html (Phase 3). Design tokens unchanged. */

:root{
  --bg:#ffffff;
  --text:#111111;
  --muted:#424242;
  --soft:#f5f5f5;
  --line:#111111;
  --red:#d32f2f;
  --blue:#1565c0;
  --yellow:#f6c90e;
  --green:#277a45;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;color:var(--text);background:var(--bg);font:16px/1.6 Montserrat,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
html{scroll-behavior:smooth}
a{color:var(--text);text-decoration:none;border-bottom:1px solid transparent}
a:hover{border-bottom-color:var(--text)}
.container{max-width:1120px;margin:0 auto;padding:0 20px}

/* Accessibility: skip link (hidden until focused) */
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;border:2px solid var(--line);padding:8px 12px;z-index:30;font-weight:700}
.skip-link:focus{left:12px;top:12px}

/* Header / navigation */
.nav{position:sticky;top:0;z-index:20;background:#fff;border-bottom:2px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0}
.logo{display:flex;align-items:center;gap:12px;min-width:235px}
.logo img{width:30px;height:30px;filter:grayscale(100%) contrast(120%)}
.logo .word{font-weight:800;letter-spacing:.04em;text-transform:uppercase;font-size:13px}
.nav-menu{display:flex}
.nav-menu>summary{display:none;list-style:none;cursor:pointer;border:2px solid var(--line);padding:8px 12px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;font-size:12px;background:#fff}
.nav-menu>summary::-webkit-details-marker{display:none}
.nav-links{display:flex;align-items:center;justify-content:flex-end;gap:14px;flex-wrap:wrap}
.nav-links a{font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:700}

/* Hero */
.hero{border-bottom:2px solid var(--line);padding:58px 0 28px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) 300px;gap:34px;align-items:center}
.hero h1{font-size:clamp(31px,5vw,58px);line-height:1.04;margin:12px 0;text-transform:uppercase;letter-spacing:0}
.hero h1::after{content:"";display:block;width:118px;height:7px;margin:18px 0 0;background:linear-gradient(90deg,var(--red) 0 33%,var(--yellow) 33% 66%,var(--blue) 66% 100%)}
.hero p{max-width:760px;margin:18px 0 0;color:var(--muted);font-size:18px}
.hero-media{border:2px solid var(--line);padding:18px;background:#fff;display:grid;place-items:center;min-height:260px}
.hero-media img{max-width:210px;width:72%;height:auto}
.hero-media .caption{margin-top:16px;font-weight:800;text-transform:uppercase;letter-spacing:.08em;text-align:center;font-size:12px}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 15px;border:2px solid var(--line);font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:13px;background:#fff}
.btn.primary{background:var(--red);color:#fff}
.btn.primary:hover{border-bottom-color:var(--line)}

/* Layout primitives */
main{padding:26px 0 80px}
section{margin:28px 0}
.band{border:2px solid var(--line);padding:20px;background:#fff}
.band.soft{background:var(--soft)}
.grid{display:grid;gap:18px}
.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{border:2px solid var(--line);background:#fff;padding:16px;min-width:0}
.card h3{margin:0 0 7px;font-size:15px;line-height:1.35;text-transform:uppercase;letter-spacing:.04em}
.card p{margin:0;color:var(--muted);font-size:14px}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.12em;text-transform:uppercase;font-weight:800;margin-bottom:8px}
.kicker::before{content:"";display:inline-block;width:10px;height:10px;background:var(--yellow)}
h2{font-size:22px;line-height:1.2;margin:0 0 12px;text-transform:uppercase;letter-spacing:.05em}
h3{font-size:16px;margin:0 0 8px;text-transform:uppercase;letter-spacing:.04em}
p{margin:0 0 12px}
.muted{color:var(--muted)}
.lead{font-size:18px;max-width:880px;color:var(--muted)}
ul,ol{margin:0;padding-left:20px}
li{margin:5px 0}
.note{font-size:14px;color:var(--muted)}
.metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:16px}
.metric{border:2px solid var(--line);padding:14px;background:#fff}
.metric strong{display:block;font-size:23px;line-height:1.1}
.metric span{display:block;margin-top:6px;color:var(--muted);font-size:13px}

/* Workflow steps */
.workflow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;gap:10px;align-items:stretch;margin-top:18px}
.step{border:2px solid var(--line);background:#fff;padding:14px;min-height:116px;display:flex;flex-direction:column;justify-content:space-between}
.step .num{font-weight:800;color:var(--red);font-size:13px}
.step strong{text-transform:uppercase;letter-spacing:.04em;line-height:1.3}
.step span{color:var(--muted);font-size:13px}
.connector{display:grid;place-items:center;font-weight:800;color:var(--blue)}

/* Roadmap timeline */
.timeline{display:grid;gap:12px;margin-top:14px}
.milestone{display:grid;grid-template-columns:145px 1fr;gap:16px;border-top:2px solid var(--line);padding-top:12px}
.milestone strong{font-size:15px;text-transform:uppercase;letter-spacing:.04em}
.milestone p{margin:0;color:var(--muted)}

/* Ecosystem */
.module-group{margin-top:18px}
.module-group h3{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.module-group h3::before{content:"";width:10px;height:10px;background:var(--blue)}
.repo-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.repo{border:2px solid var(--line);padding:12px;background:#fff}
.repo a{font-weight:800}
.repo span{display:block;margin-top:4px;color:var(--muted);font-size:13px}

/* Publications */
.publication{border-top:2px solid var(--line);padding:14px 0}
.publication:first-of-type{border-top:0}
.publication h3{margin-bottom:4px}
.coming{color:var(--muted);font-size:13px;font-style:italic}

/* Tags and status chips */
.tag{display:inline-block;border:1px solid #bdbdbd;color:var(--muted);padding:2px 7px;margin:4px 6px 0 0;font-size:11px;font-weight:600;text-transform:none;letter-spacing:0;background:#fafafa}
.tag.shipped{background:var(--green);border-color:var(--green);color:#ffffff;font-weight:700}
.tag.dev{background:var(--yellow);border-color:var(--yellow);color:#111111;font-weight:700}
.tag.future{background:#ffffff;border-color:var(--blue);color:var(--blue);font-weight:700}

/* Figures (used by workflow screenshots) */
figure{margin:18px 0}
figure img{max-width:100%;height:auto;border:2px solid var(--line);display:block}
figcaption{margin-top:8px;font-size:13px;color:var(--muted)}

footer{border-top:2px solid var(--line);padding:24px 0 58px;color:var(--muted)}

/* Motion preferences */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}

/* Responsive */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .hero-media{min-height:180px}
  .workflow{grid-template-columns:1fr}
  .connector{min-height:16px}
  .connector::before{content:"down"}
  .connector{font-size:0}
  .metric-row,.cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .repo-list,.cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:721px){
  .nav-menu>.nav-links{display:flex !important}
}
@media (max-width:720px){
  .container{padding:0 16px}
  .nav-inner{align-items:flex-start;flex-direction:column}
  .nav-menu{width:100%}
  .nav-menu>summary{display:inline-block}
  .nav-menu:not([open])>.nav-links{display:none}
  .nav-menu>.nav-links{padding:10px 0;justify-content:flex-start;gap:10px}
  .hero{padding-top:36px}
  .hero h1{font-size:33px}
  .cols-2,.cols-3,.cols-4,.metric-row,.repo-list{grid-template-columns:1fr}
  .milestone{grid-template-columns:1fr;gap:6px}
  .btn{width:100%}
}

/* Spacing utilities (replace inline styles) */
.mt-10{margin-top:10px}
.mt-14{margin-top:14px}
.mt-16{margin-top:16px}
.mt-22{margin-top:22px}
.mt-40{margin-top:40px}
.error-title{font-size:clamp(28px,4vw,44px);text-transform:uppercase;margin:12px 0}